Video: Lub peev xwm kub ntawm ib yam khoom yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov Thaum tshav kub kub muaj peev xwm , los yog 'thermal mass' ntawm ib khoom , yog txhais raws li Lub Zog hauv Joules yuav tsum tau nce qhov kub ntawm qhov muab khoom los ntawm 1º C. Qhov no yog qhov tshwj xeeb kub ' ntawm khoom (ib qho cuab yeej cuab tam lub cev / tshuaj lom neeg) muab faib los ntawm nws qhov loj thiab qhov hloov pauv ntawm qhov kub thiab txias.
Ib yam li ntawd, nws raug nug, dab tsi yog qhov ntsuas kub ntawm cov khoom ntsuas?
Thaum tshav kub kub muaj peev xwm yog ntsuas lub cev kom muaj nuj nqis uas characterizes tus nqi ntawm kub yuav tsum tau hloov ib yam khoom kub los ntawm tus nqi muab. Nws yog ntsuas hauv joules ib Kelvin thiab muab los ntawm. Cov Thaum tshav kub kub muaj peev xwm yog ib qho cuab yeej dav, scaling nrog cov qhov loj ntawm qhov system.
Tom qab, lo lus nug yog, dab tsi yog qhov kub ntawm cov dej? Qhov tshwj xeeb kub ntawm dej yog 1 calorie / gram ° C = 4.186 joule / gram ° C uas siab dua lwm yam khoom siv. Vim li ntawd, dej plays lub luag haujlwm tseem ceeb hauv kev tswj qhov kub thiab txias.
Tom qab, lo lus nug yog, dab tsi yog lub peev xwm ua kom sov piav qhia?
Thaum tshav kub kub muaj peev xwm , ratio ntawm kub absorbed los ntawm ib yam khoom mus rau qhov kub thiab txias hloov. Nws yog feem ntau qhia raws li calories ib degree nyob rau hauv cov nqe lus ntawm qhov tseeb npaum li cas ntawm cov khoom raug txiav txim, feem ntau yog ib tug mole (lub molecular hnyav nyob rau hauv grams). Cov Thaum tshav kub kub muaj peev xwm nyob rau hauv calories ib gram yog hu ua tshwj xeeb kub.
Q MC _firxam_#8710 yog dab tsi; T siv rau?
Q = mc∆T . Q = tshav kub zog (Joules, J) m = loj ntawm ib yam khoom (kg) c = tshwj xeeb kub (units J / kg∙K) ∆ yog lub cim txhais tias "kev hloov hauv"
Pom zoo:
Nws txhais li cas yog tias ib yam khoom muaj lub peev xwm kub tshwj xeeb?
Cov cua kub tshwj xeeb yog Jg−oK. Yog li, tus nqi siab txhais tau hais tias nws yuav siv ntau lub zog los tsa (lossis qis dua) nws qhov kub thiab txias. Ntxiv cov cua sov rau qhov "tseem ceeb tshwj xeeb" qhov sib xyaw ua ke yuav ua rau nws qhov kub thiab txias sai dua li ntxiv cov cua sov rau cov cua kub tshwj xeeb
Dab tsi yog qhov txawv ntawm electrostatic muaj peev xwm thiab electrostatic muaj peev xwm zog?
Tsis muaj qhov sib txawv ntawm electrostatic potentialenergy thiab hluav taws xob (al) muaj peev xwm zog. Lub peev xwm hluav taws xob ntawm ib qho taw tes yog kev ua haujlwm los ntawm lwm qhov kev quab yuam hauv kev txav chav tsev zoo los ntawm ib qho arbitrarilychosen xoom ntawm lub peev xwm (feem ntau infinity) mus rau lub ntsiab lus
Puas muaj peev xwm hluav taws xob thiab lub zog muaj peev xwm tib yam Vim li cas lossis vim li cas ho tsis?
Lub zog muaj peev xwm hluav taws xob Ue yog lub zog muaj peev xwm khaws cia thaum cov nqi tawm ntawm qhov sib npaug (xws li lub zog muaj peev xwm gravitational). Lub peev xwm hluav taws xob zoo ib yam, tab sis ib tus nqi, Ueq. Ib qho hluav taws xob muaj peev xwm sib txawv ntawm ob lub ntsiab lus hu ua voltage, V = Ue2q−Ue1q
Thaum tshav kub kub muaj peev xwm vs tshwj xeeb tshav kub yog dab tsi?
Molar Thaum tshav kub kub muaj peev xwm yog ib qho kev ntsuas ntawm cov cua sov uas tsim nyog los nce qhov kub ntawm ib mole ntawm ib tug ntshiab tshuaj los ntawm ib tug degree K. Tshwj xeeb kub muaj peev xwm yog ib qho kev ntsuas ntawm tus nqi ntawm cov cua sov tsim nyog los nce qhov kub ntawm ib gram ntawm ib tug ntshiab. khoom los ntawm ib degree K
Yam dab tsi ntawm cov dej zoo tshaj plaws piav qhia nws lub peev xwm los yaj ntau yam khoom siv?
Vim tias nws cov polarity thiab muaj peev xwm tsim cov ntawv cog lus hydrogen, dej ua rau cov kuab tshuaj zoo heev, txhais tau tias nws tuaj yeem yaj ntau hom molecules